I did a little hand sanding today. Blade wasn't bad, so I did 1000 and 2000. When I move on to Flitz, what is the best medium to use to apply it?

I have some micro fiber cloths, but I feel that they are too soft. Doesn't look like the Flitz is doing much.

I guess my question is, should I be using a rag/cloth with a bit of texture or did I move up to the Flitz too soon?

Thanks.